Question

The conditions necessary for combustion are……………
A. Presence of combustible substance
B. Presence of supporter of combustion
C. Attainment of ignition temperature
D. All of these

Answer 1

Hint: To give an answer to this question we can think of an example. Let’s assume you want to burn some wooden material, so, here just find the required condition to satisfy this task to be done. The terms given in the options are related to combustion only.

Complete step by step answer:

First, let’s define Combustion.
Combustion is a chemical reaction in which a combustible or flammable substance reacts with gas (which is a supporter of combustion, for example, oxygen) and they release heat.
The reaction is exothermic in nature.

Necessary factors that are required for a combustion reaction to take place are :
A combustible or flammable substance. For example wood, petroleum, etc.
Ignition temperature. The fuel must be at or above this 'ignition temperature'.
A gas that is a supporter of combustion (oxygen). An abundant supply of such a gas is required.

Therefore, we can conclude that all the conditions are necessary for this process. So, the correct answer to this question is option D.

Note: Here, we should also know about the non-combustible substances.
A non-combustible substance is that which is not capable of igniting and burning. Examples of non - combustible materials include Portland cement concrete, gypsum concrete, or magnesite. These substances have opposite properties to that of a combustible substance.